Method for supporting PDN GW selection

ABSTRACT

A method for supporting PDN GW selection, comprising the following steps of: receiving by an MME a local route optimization service request information; searching by the MME the IP address of a PDN GW which supports local route optimization according to the IP address of a PDN GWh; sending by the MME a bearer request establishment message to the PDN GWh. The method of the present invention can ensure core network equipment to find PDN GW correctly while HeNB system supports local route optimization.

TECHNICAL FIELD

The present invention relates to the filed of communications, and inparticularly to a method for selecting PDN GW supporting HeNB localroute optimization.

BACKGROUND ART

The structure of SAE system is illustrated in FIG. 1. The following is adescription of the structure of the SAE system in FIG. 1.

101 User Equipment (UE) is a terminal device to receive data. 102 EUTRANis a radio access network in the evolved system SAE, including a macrobase station (eNB), which is responsible for providing a radio networkaccess interface for LTE mobile phones, and is connected with the mobilemanagement entity MME 103 and the user plane entity 104 Serving Gateway(S-GW) of the mobile phones through the interface S1 . 103 MME isresponsible for managing UE's mobile context, session context, andsaving user security information. 104 Serving Gateway primarily offersthe functions in the user plane. The interface S1 -MME is responsiblefor establishing radio access bearer for UE, forwarding the messagessent from UE to MME through the radio access network. The combinedfunction of 103 MME and 104 Serving Gateway is similar to that of theoriginal 108 SGSN (General Packet Radio Service (GPRS) supporting node).And it is possible that both MME and Serving Gateway could locate at thesame physical entity. 105 PDN Gateway (PDN GW) is responsible forfunctions such as charging and legal listening. Both the Serving Gatewayand the PDN Gateway may locate at the same physical entity. 108 SGSNoffers routing for data transmission in the existing UMTS. The existingSGSN finds corresponding Gateway GPRS Supporting Nodes (GGSN) accordingto a Access Point Name (APN). 109 HSS is a home subscription sub-systemfor subscribers, which is responsible for saving subscriber information,such as the UE's current location, the serving node's address,subscriber security information, UE's activated packet data protocol(PDP) context and so on. 106 PCRF offers QoS policy and charging rulesthrough interface S7.

As shown in FIG. 2, the current HeNB system exists in 102 E-UTRAN. Thecurrent HeNB system has two possible architectures. One is that HeNBexists in E-UTRAN as a separate access equipment and the other is thattwo pieces of access equipment HeNB and HeNB GW exist in the E-UTRANsystem. HeNB GW has less equipment and is used to manage a plurality ofHeNBs. From the perspective of a core network, HeNB and HeNB GW can beregarded as the existing eNB, but the interface from HeNB GW or HeNB tothe core network is the same as that of the existing SAE system. HeNB isdeployed in a subscriber's home. If HeNB-GW exists in a HeNB system, itis deployed in the operator's network.

HeNB supports local route optimization function, including a directaccess from UE to Internet through HeNB or a direct access from UE toother electronic equipments in the subscriber's home through HeNB,rather than through any core network node. This provides the advantageof reducing routing of subscriber data. When HeNB GW exists, the localroute optimization function is still accessed to Internet through HeNB.There is no need to waste resources of the fixed network through HeNBGW.

In order to support the HeNB local route optimization function, thesystem architecture of the existing HeNB shall be enhanced. Since thereare various possibilities, the architecture has not yet been finalizedand only some basic principles are finalized, which include that HeNBneeds to have the function of PDN GW (the PDN GW on HeNB, hereinafterreferred to as PDN GWh for short). However, when the local routeoptimization service is activated, MME cannot correctly find a route tothe PDN GW on HeNB according to the existing methods for finding PDN GW.Therefore, the present patent proposes an effective method for findingPDN GW.

In order to support the HeNB local route optimization function, thereare several possibilities as follows:

Possibility 1: the HeNB network entity needs to have functions ofServing GW and PDN GW. When UE activates any other non-local routeoptimization service, it is necessary for the user plane routingrequiring this service to pass through the Serving GW of the corenetwork, rather than the Serving GW on HeNB while passing through thecore network equipment. In such circumstances, there are two Serving GWsfor the same UE network;

Possibility 2: the HeNB network entity has functions of Serving GW andPDN GW and when UE needs to activate any other non-local routeoptimization service, it is necessary for the user plane routingrequiring this service to pass through the Serving GW on HeNB whilepassing through the core network equipment.

Possibility 3: the HeNB network entity has functions of Serving GW, PDNGW and MME. In this case, when the local route optimization service isactivated, it is unnecessary for a signaling of the control plane to goto MME of the operator's network. In the circumstances, it not onlysaves the data routing of the user plane but also saves the signaling ofthe control plane.

DISCLOSURE OF INVENTION Technical Problem

Regarding the above possibilities, there is a problem that how MME cancorrectly finds the address of PDN GW. This patent application only takePossibility 1 as an embodiment of the present invention. Other possiblearchitectures still can apply the methods included in this patentapplication.

Solution to Problem

The present invention is to provide a method which supports finding PDNGW in an HeNB system.

A method for supporting PDN GW selection comprises the following stepsof:

receiving by an MME a local route optimization service requestinformation;

searching by the MME the IP address of a PDN GW which supports localroute optimization according to the IP address of a PDN GWh;

sending by the MME a bearer request establishment message to the PHNGWh.

Advantageous Effects of Invention

With the method of the present invention, it is ensured that the corenetwork equipment can correctly find PDN GW while the HeNB systemprovides local route optimization.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 shows the network structure of the SAE system;

FIG. 2 shows the network structure of the HeNB system;

FIG. 3 shows Embodiment 1: PDN connection establishment process;

FIG. 4 shows Embodiment 2: PDN connection establishment process;

FIG. 5 shows Embodiment 3: HeNB power-on process;

FIG. 6 shows Embodiment 4: PDN connection establishment process;

FIG. 7 shows Embodiment 5: initial access process;

FIG. 8 shows Embodiment 6: PDN connection establishment process;

FIG. 9 shows Embodiment 7: PDN connection establishment process;

FIG. 10 shows Embodiment 8: PDN connection establishment process;

FIG. 11 shows Embodiment 8: S1 establishment process;

FIG. 12 shows Embodiment 8: PDN connection establishment process;

MODE FOR THE INVENTION

In Embodiment 1 of the present invention UE requests for establishing alocal route optimization service, and a PDN connection process of the UErequest is shown in FIG. 3.

The following is the detailed description of this figure. And thedetailed technical description of any technology unrelated to thepresent invention is omitted in the following.

301. RRC connection establishment process

301 a UE sends an NAS message to HeNB through an uplink directtransmission.

302. HeNB sends S1 message via uplink direct transmission to HeNB GW,wherein the message needs to include address information of PDN GWh, orof S-GWh and PDN GWh (S-GWh and PDN GWh refers to S-GW and PDN GWlocated on HeNB, and is used to distinguish them from S-GW and PDN GW inthe core networks). Furthermore, the message also includes informationabout whether HeNB has the ability to support local route optimization.If there is no HeNB GW, HeNB will send the message directly to MME.

If MME acquires the address of PDN GWh, or of S-GWh and PDN GWh and theinformation about whether HeNB has the ability to support local routeoptimization through the initial UE message during network attachingbefore the activation of local route optimization service, theinformation via uplink direct transmission does not need to carry theaddress of PDN GWh, or of S-GWh and PDN GWh and the information aboutwhether HeNB has the ability to support local route optimization.

303. HeNB GW sends S1 message via uplink direct transmission to MME,wherein the message needs to contain address information of PDN GWh.HeNB reports to MME information about whether it supports local routeoptimization.

304. For the UE, MME receives PDN connection establishment request inthe form of NAS message after S1 connection has been establishedsuccessfully. The message may contain APN information requested by UE.The PDN connection establishment request in a form of NAS messagefunctions as a request message for activating the local routeoptimization.

MME has UEs' subscription information saved on it, wherein informationof APN and PDN GW ID are contained. And APN information requested by UEcontains the type of the service requested by UE, such as a local routeoptimization service. MME verifies APN of the request according to thesubscription information of UE, and then it starts searching PDN GWaddress when the subscription information of UE contains the local routeoptimization service. Otherwise, MME refuses the PDN connection requestand suspends the following processes if its verification fails. Anotherway in which MME decides whether or not to permit PDN connection for UErequest is that: UE is permitted to access the local route optimizationservice only if UE is a member in HeNB group and HeNB can support thelocal route optimization service. MME can also verify that whether UEhas applied for the local route optimization service in other ways,while the invention will still applicable. Since the service UE requestsis a local route optimization service, MME needs not to searchappropriate PDN GW for the UE in the way of PDN GW ID+APN, but canconduct it through the address of PDN GWh carried on S1 message.

Note that, as one implementation mode of the invention, MME refuses toprocess the activation request of the local route optimization appliedby UE, if the HeNB is incapable of supporting local route optimization(as Embodiment shown in FIG. 9). And as another implementation mode ofthe invention, MME establishes bearer(s) for the service UE applies incommon service mode (without local route optimization, but communicationover the core network).

MME searches appropriate PDN GW for UE according to the saved defaultAPN information, if the PND connection request does not contain APNinformation. MME searches PDN GW according to acquired PDN GWh addressinformation if the default APN contains information about local routeoptimization service. Otherwise, MME will search for PDN GW address bynormal processes.

305. MME sends a default bearer establishment request message to PDN GWhaccording to the address of PDN GWh.

All of the subsequent processes are omitted in the description, for theyare the same as the existing ones.

Embodiment 2 of the present invention shows that UE requests toestablish a local route optimization service, and shows a PDN connectionrequested by UE. And detailed technical description of technologyunrelated to the present invention is omitted in FIG. 4.

401. RRC connection establishment process

401 a. UE sends a NAS message via uplink direct transmission to HeNB.

402. HeNB sends an S1 message via uplink direct transmission to HeNB GW,wherein the message contains information about whether HeNB possessesthe ability of supporting local route optimization. HeNB directly sendsthe message to MME if HeNB GW is absent.

403. HeNB GW sends an S1 message via uplink direct transmission to MME,and HeNB reports to MME about whether it is capable of supporting localroute optimization.

404. For the UE, MME receives PDN connection establishment request inthe form of NAS message after the S1 connection has been establishedsuccessfully. The message may contain APN information UE requests.

405. The subscription information stored in HSS contains APN andcorresponding

PDN GW ID. The service operator can select to directly configure IPaddress of PDN GWh in PDN GW ID of APN corresponding to the local routeoptimization service and contained in HeNB, or select to store S-GW andPDN GWh existing in the subscription information in other forms for thesigned-in subscriber of HeNB if UE has subscribed with local routeoptimization service. MME can directly find PDN GWh according to the PDNGWh IP address contained in PDN ID which is acquired from HSS orS-GWh/PDN GWh in other subscription information during MME's selectionof the appropriate PDN GW.

Note that, as an implementation mode of the invention, MME refuses toprocess the activation request of the local route optimization requestedby UE if said HeNB does not possess the capability of supporting localroute optimization (as the embodiment shown in FIG. 9). And as anotherimplementation mode of the invention, MME establishes bearer(s) for theservice requested by UE in a common service mode.

The following processes are same as those of Embodiment 1.

The Power-on process of Embodiment 3 of the present invention is asshown in FIG. 5. The following is the detailed description of thisfigure. And detailed technical description of technology unrelated tothe present invention is omitted in the following.

501 HeNB will directly establish secure tunnel with the security gatewayafter Powered-on, and then the security gateway assigns IP address toHeNB after the tunnel has been established, wherein the IP address is aninternal IP address of the operator network and it cannot be accessed byany external equipment.

502. HeNB exchanges information mutually with its HeNB Management system(HMS), and then HMS verifies HeNB, provides it with configurationparameters for the authentic HeNB and searches appropriate HeNB GW forit, if it is authentic. HMS can acquire SGWh/PDN GWh IP address assignedfor the HeNB through other OAM (Operator Administration and Maintenance)equipments during the process. And MME needs to save the correspondingSGWh/PDN GWh IP address assigned for this HeNB.

503. Registration process of HeNB.

Embodiment 4 of the present invention shows that UE requests toestablish a local route optimization service, and shows a PDN connectionrequested by UE. As shown in FIG. 6, detailed technical description oftechnology unrelated to the present invention is omitted in thefollowing.

601-604 is the same as those in Embodiment 2.

MME saves correspondence relationship between the HeNB which supports alocal route optimization service and the pre-configured PDN GWh's IPaddress, in which the identifier of HeNB could be HeNB ID or CSG ID aswell, or information such as IP address and so on, and only such ID canidentify the HeNB exclusively. During the power on and registrationprocess of HeNB, MME can tell the security gateway and other equipmentsthe pre-configured PDN GWh/SGWh address through OAM equipments and soon, to guarantee that the address pre-configured in MME is assigned forthe SGWh/PDN GWh which serves the UE during activation of local routeoptimization service.

When MME receives PDN connection request of UE, and the request containsinformation of local route optimization service, the MME will verify therequest at first, and then find corresponding IP address of SGWh/PDN GWhaccording to ID of the HeNB, if the request passes verification.

Note that, as an implementation mode of the invention, MME refuses toprocess the activation request of the local route optimization requestedby UE if said HeNB is unable to support local route optimization (as theembodiment shown in FIG. 9). And as another implementation mode of theinvention, MME establishes bearer(s) for the service UE applies incommon service mode.

605. MME sends a default bearer establishment request according to PGWaddress information.

All of the subsequent processes are the same as those in Embodiments 1and 2.

Embodiments 1, 2, 3, 4 and 8 show four methods of searching PDN GW inthe condition that local route optimization function is supported. Thefour methods may be substitutes for each other.

Embodiment 5 of the present invention shows a network attaching process.As shown in FIG. 7, detailed technical description of technologyunrelated to the present invention is omitted in the following.

701 RRC Connection Establishment

701 a. UE sends NAS message via uplink direct transmission to HeNB.

702. UE message is initiated, which carries address information of PDNGWh on HeNB which supports local route optimization.

If UE executes attaching process first, and then executes connection ofmultiple PDN in order to activate local route optimization service, themessage via uplink direct transmission during the connection of multiplePDN can carry no address information of PDN GWh saved on HeNB andinformation about the ability of HeNB to support local routeoptimization. MME can acquire PDN GWh address and the ability of HeNB tosupport local route optimization, according to the initial UE message inthe attaching process.

705 according to the NAS message, MME neglects the proposed Method 1 or2 or 3 if NAS message is a network attach request, or it searches PDN GWaddress according to Method 1 or 2 or 3 or 4 if NAS message is PDNactivation request or other NAS message and it contains local routeoptimization service indicated by APN.

Embodiment 6 of the invention shows a PDN connection establishingprocesses. As shown in FIG. 8, detailed technical description oftechnology unrelated to the present invention is omitted in thefollowing.

801-803 are processes executed according to methods in Embodiments 1 to4.

804 MME can distinguish which bearer supports the local routeoptimization service, so it carries identification information whichidentifies which bearer supports local route optimization service in itsresponse to bearer establishment request accepting PDN connectionestablishment. If multiple bearers are established to support localroute optimization service, each bearer should add the identificationinformation about supporting local route optimization service.

Furthermore, HeNB can distinguish multiple bearers on it and which ofthose bearers supports local route optimization service.

Such embodiment is applicable to transferring UE from HeNB to otherareas, and it can guarantee effective release of bearers that supportlocal route optimization service and non release of bearers that don'tsupport local route optimization service as well.

Embodiment 7 of the invention shows a PDN connection establishingprocesses. As shown in FIG. 9, detailed technical description oftechnology unrelated to the present invention is omitted in thefollowing.

Embodiment 7 describes processes of MME determining whether or not topermit the UE to access local route optimization service according towhether HeNB is capable of supporting local route optimization service.

901. Processes of RRC connection establishment.

901 a. UE sends a NAS message to HeNB via uplink direct transmission.

902. HeNB sends an uplink direct transmission message carryinginformation about whether it supports local route optimization serviceto HeNB GW. Said uplink direct transmission message can be sent viacurrent uplink transmission and a new S1 message. If UE executes theattaching process first, and then multi-PDN connection process in orderto activate local route optimization service, HeNB sends a message viauplink direct transmission to MME during the process. The message cancontain information indicating whether the HeNB is capable of supportinglocal route optimization.

903. HeNB GW sends the message which carries information indicatingwhether the HeNB is capable of supporting local route optimization toMME. This message can be transmitted both through the existing messagevia uplink direct transmission and a new S1 . If there is a scenario ofno HeNB GW deployed, the initial UE message will be directly sent to MMEthrough HeNB GW, rather than being forwarded through it. If UEimplements multi-PDN connection process prior to the attaching processto activate local route optimization service, the HeNB will send themessage via uplink direct transmission to MME in this step. The messagecan contain the information indicating whether the HeNB is capable ofsupporting local route optimization.

904. For this UE, after S1 connection is successfully established, MMEreceives NAS message requesting for establishing PDN connection. The NASmessage requesting for establishing PDN connection functions as arequest message for activating local route optimization service.

905. If the HeNB is incapable of supporting the local routeoptimization,

905 b. MME replies the UE's request for PDN connection. This replymessage includes the reason for UE access-rejection to the local routeoptimization service, for example, HeNB does not support the local routeoptimization service. UE can be reaccessed according to a commonservice.

If HeNB is capable of supporting the local route optimization service,

MME will search PDN GW for UE according to the above method described inEmbodiments 1, 2, 3 and 4.

Embodiment 8 of the present invention describes the PDN connectionestablishment process. As illustrated in FIGS. 10, 11 and 12, thedetailed description of technology unrelated to the present inventionare omitted.

This Embodiment is also a method for supporting local routeoptimization-enabled PDN GW search. (Method 4)

This Embodiment can be applied in two situations:

Situation 1: PDN GWh and HeNB have the same IP addresses. PDN connectionprocess is shown in FIG. 10.

Situation 2: PDN GWh and HeNB have different IP addresses. S1 and PDNconnection processes are shown in FIGS. 11 and 12, respectively.

1001. UE sends a PDN connection request. The NAS message requesting forestablishing PDN connection functions as a request message foractivating local route optimization service.

1002. MME searches for the address of a PDN GW capable of supporting thelocal route optimization for UE according to the message carried by theUE's PDN connection request or the user's subscription message.

If the PDW GWh and the HeNB have the same IP addresses in the conditionthat an HeNB GW is deployed, the connected HeNB address will be storedon the HeNB GW. MME directly sends the S1 local route optimizationmessage to HeNB GW after receiving the PDN connection request foractivating the local route optimization service. It requests foracquiring the PDN GWh address and the HeNB's capability of supportinglocal route optimization.

If the HeNB and the PDN GWh have the same IP addresses in the conditionthat there is no HeNB GW deployed, the HeNB's IP address information isunnecessary for sending, since it is stored on the MME. The local routeoptimization supporting capability of the HeNB is acquired as shown inFIG. 11 through S1 establishing process.

1003. HeNB GW sends a local route optimization response message to MME.The response message contains PDN GWh address information and the HeNB'ssupporting capability to local route optimization.

1004. MME sends a default bearer establishment request message accordingto the acquired PDN GWh address.

When the HeNB and the PDN GWh have different IP addresses in thesituation two,

1101. HeNB sends a S1 connection establishment message carrying the PDNGWh address to HeNB GW. HeNB GW will save the corresponding relationshipbetween the address information and the HeNB.

In the message, HeNB also can send information indicating whether it iscapable of supporting local route optimization to HeNB GW. HeNB GW willalso save the corresponding relationship of local route optimizationsupporting capabilities between HeNBs.

In the condition that the HeNB GW is deployed, during the S1establishment process from HeNB GW to MME, it is unnecessary to send themessage carrying PDN GWh address information or the informationindicating whether HeNB supports local route optimization to MME, butmerely storing the above corresponding relationship on HeNB GW.

On the contrary, the S1 connection establishment message sent to MMEfrom the HeNB needs to carry the PDN GWh address information or theinformation indicating whether HeNB supports local route optimization.MME have stored the corresponding relationships of the HeNB and the PDNGWh, and the local route optimization supporting capabilities of theHeNBs.

1201. UE sends a PDN connection request to MME. The NAS messagerequesting for establishing PDN connection functions as a requestmessage for activating local route optimization service.

MME searches for the address of a PDN GW capable of supporting the localroute optimization for UE, according to the information carried by theUE's PDN connection request or subscription message.

If MME hasn't stored the corresponding relationship of the HeNB and thePDN

GWh or the corresponding relationship of the local route optimizationsupporting capabilities of the HeNBs,

1202. the MME will send the S1 local route optimization request messageto HeNB GW so as to acquire PDN GWh address information or HeNBcapability information from the HeNB GW.

If MME has stored the corresponding relationship between the HeNB andthe PDN GWh or the corresponding relationship between the local routeoptimization supporting capabilities of the HeNBs and the HeNBs, forexample, there is no HeNB GW deployed, it is unnecessary for MME toimplement the steps of 1202 and 1203.

1203. HeNB GW sends local route optimization response message to MME.The message contains PDN GWh address information or informationindicating whether HeNB is capable of supporting local routeoptimization. Or the two types of information are both responded.

1204. MME sends a default bearer establishment request according to theacquired PDN GWh.

MME can decide whether to continue PDN connection process according toHeNB's capability message. For detailed process, please refer toEmbodiment 7 and FIG. 9.

Although the invention is described by example of the above embodiments,all these embodiments are intended to illustrate, rather than limit, thepresent invention. Those skilled in the art could easily modify, add,delete any step of these embodiments without departing from the spiritand range of the present invention.

The invention claimed is:
 1. A method for selecting a gateway by amobility management entity (MME) in a wireless communication systemsupporting a local internet protocol access (LIPA), the methodcomprising: receiving, from a base station, a message related to aterminal; identifying, if an access point name (APN) related to theterminal is authorized for the LIPA according to subscriptioninformation, whether a connection corresponding to the message isauthorized based on the subscription information; identifying whetherthe message comprises an address of a gateway collocated with the basestation; selecting, if the connection is permitted based on thesubscription information and the message comprises the address, agateway using the address included in the message; and rejecting, if apermission of the connection requested by the terminal is set to LIPA,the connection based on the message.
 2. The method of claim 1, whereinthe address is included in an s1 message.
 3. The method of claim 1,wherein the message is an initial ue message.
 4. The method of claim 1,wherein the subscription information comprises at least one closedsubscriber group identifier (CSG ID), the at least one CSG ID is usedfor authorizing the LIPA connection.
 5. The method of claim 1, furthercomprising: transmitting, if the message to request the LIPA is rejectedbased on information included in the message and the APN corresponds tothe LIPA, a response message to reject the message.
 6. A method forsupporting gateway selection by a base station in a wirelesscommunication system supporting a local interne protocol access (LIPA),the method comprising: transmitting, to a mobility management entity(MME), a message related to a terminal; and receiving, from the MME, aresponse message in response to the message, wherein it is identifiedwhether a connection corresponding to the message is authorized based onsubscription information by the MME, if an access point name (APN)related to the terminal is authorized for the LIPA corresponding to themessage, wherein it is identified whether the message comprises anaddress of a gateway collocated with the base station by the MME,wherein a gateway is selected using the address included in the message,if the connection is permitted based on the subscription information andthe message comprises the address, and wherein the connection request bythe terminal is rejected based on the message, if a permission of theconnection requested by the terminal is set to LIPA.
 7. The method ofclaim 6, wherein the address is included in an s1 message.
 8. The methodof claim 6, wherein the message is an initial ue message.
 9. The methodof claim 6, wherein the subscription information comprises at least oneclosed subscriber group identifier (CSG ID), the at least one CSG ID isused for authorizing the LIPA connection.
 10. The method of claim 6,wherein the receiving the response message comprises: receiving, if themessage to request the LIPA is rejected based on information included inthe message and the APN corresponds to the LIPA, the response message toreject the message.
 11. An apparatus for selecting a gateway in awireless communication system supporting a local internet protocolaccess (LIPA), the apparatus comprising: a transceiver for transmittingand receiving a signal; and a controller configured to: receive, from abase station, a message related to a terminal, identify, if an accesspoint name (APN) related to the terminal is authorized for the LIPAaccording to subscription information, whether a connectioncorresponding to the message is authorized based on the subscriptioninformation, identify whether the message comprises an address of agateway collocated with the base station, select, if the connection ispermitted based on the subscription information and the messagecomprises the address, a gateway using the address of the gatewayincluded in the message, and reject, if a permission of the connectionrequested by the terminal is set to LIPA, the connection based on themessage.
 12. The apparatus of claim 11, wherein the address is includedin an s1 message.
 13. The apparatus of claim 11, wherein the firstmessage is an initial ue message.
 14. The apparatus of claim 11, whereinthe subscription information comprises at least one closed subscribergroup identifier (CSG ID), the at least one CSG ID is used forauthorizing the LIPA connection.
 15. The apparatus of claim 11, thecontroller is further configured to transmit, if the message to requestthe LIPA is rejected based on information included in the message andthe APN corresponds to the LIPA, a response message to reject themessage.
 16. An apparatus for supporting gateway selection in a wirelesscommunication system supporting a local internet protocol access (LIPA),the apparatus comprising: a transceiver for transmitting and receiving asignal; and a controller configured to: transmit, to a mobilitymanagement entity (MME), a message related to a terminal, and receive,from the MME, a response message in response to the message, wherein itis identified whether a connection corresponding to the message isauthorized based on subscription information by the MME, if an accesspoint name (APN) related to the terminal is authorized for the LIPAcorresponding to the message, wherein it is identified whether themessage comprises an address of a gateway collocated with the basestation by the MME, wherein a gateway is selected using the addressincluded in the message, if the connection is permitted based on thesubscription information and the message comprises the address, andwherein the connection request by the terminal is rejected based on themessage, if a permission of the connection requested by the terminal isset to LIPA.
 17. The apparatus of claim 16, wherein the address isincluded in an s1 message.
 18. The apparatus of claim 16, wherein themessage is an initial ue message.
 19. The apparatus of claim 16, whereinthe subscription information comprises at least one closed subscribergroup identifier (CSG ID), the at least one CSG ID is used forauthorizing the LIPA connection.
 20. The apparatus of claim 16, thecontroller is further configured to receive, if the message to requestthe LIPA is rejected based on information included in the message andthe APN corresponds to the LIPA, the response message to reject themessage.